/Engine/Source/Runtime/Engine/Classes/Kismet/KismetRenderingLibrary.h
Returns a Canvas object that can be used to draw to the specified render target. Canvas has functions like DrawMaterial with size parameters that can be used to draw to a specific area of a render target. Be sure to call EndDrawCanvasToRenderTarget to complete the rendering!
static void BeginDrawCanvasToRenderTarget ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * WorldContextObject, [UTextureRenderTarget2D](API\Runtime\Engine\Engine\UTextureRenderTarget2D) * TextureRenderTarget, [UCanvas](API\Runtime\Engine\Engine\UCanvas) *& Canvas, FVector2D & Size, [FDrawToRenderTargetContext](API\Runtime\Engine\Kismet\FDrawToRenderTargetContext) & Context )